Baldwin DS-4-4-660

The Baldwin DS-4-4-660 was a four-axle 660 horsepower (490 kW) diesel-electric switcher built by the Baldwin Locomotive Works at it Eddystone, Pennsylvania factory between 1946 and 1949. It replaced the 660 horsepower (490 kW) VO-660 in their catalog, and was in turn replaced by the 750 horsepower (560 kW) DS-4-4-750. It was the low power companion to Baldwin's DS-4-4-1000 models.

Baldwin DS-4-4-660
A very rusty Baldwin DS-4-4-660 locomotive sits next to the NS main in Roanoke, VA. This is one of "The Lost Engines of Roanoke" and is Chesapeake Western #663.
Type and origin Power type Diesel-electric Builder Baldwin Locomotive Works Build date June 1946 to May 1949 Total produced 139
Specifications Configuration: ​  • AAR B-B Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Length 46 ft 6 ^1⁄4 in (14.18 m) Width 9 ft 11 ^1⁄4 in (3.03 m) Height 14 ft (4.27 m) Loco weight 196,600 lb (89,200 kg) Prime mover 606NA RPM range 625 rpm max. Engine type Four-stroke diesel Aspiration Normally aspirated, solid injection Displacement 1,979 cu in (32.43 L) per cylinder 11,874 cu in (194.58 L) total Generator DC type 480 Traction motors West’hse 362-D Cylinders Straight-6 Cylinder size 12 ^3⁄4 in × 15 ^1⁄2 in (324 mm × 394 mm)) Loco brake Air Train brakes Air
Performance figures Power output 660 hp (492 kW) Tractive effort 56,500 lb (25,600 kg)
Career Locale North America

Original owners

Railroad	Quantity	Road numbers	Notes
American Cyanamid Company	1	13
American Rolling Mill Company	1	1001
Chesapeake Western Railway	3	661–663
Chicago, St. Paul, Minneapolis and Omaha Railway (“Omaha Road”)	1	71
Chicago and North Western Railway	3	1259–1261
Crows Nest Pass Coal	1	1
Escanaba and Lake Superior Railroad	1	101
Erie Railroad	5	381–385
Georgia Northern Railway	1	102
Long Island Rail Road	4	409–412
New Orleans Public Belt Railroad	6	44–49
Norfolk Southern Railway	3	661–663
Patapsco and Back Rivers Railroad	4	306–309
Pennsylvania Railroad	99	5957–5966, 9000–9049, 9110–9121, 9210–9236	PRR Class BS-6a
Sloss-Sheffield Steel	1	30
Tennessee Valley Authority	1	100
Wabash Railroad	2	201–202
Wyandotte Southern Railroad	1	D100
Wyandotte Terminal Railroad	1	104
Total	139

References

• Dorin, Patrick C. (1972). Chicago and North Western Power. Burbank, California: Superior Publishing. p. 158. ISBN 0-87564-715-4.
• Kirkland, John F. (November 1994). The Diesel Builders volume 3: Baldwin Locomotive Works. Pasadena, California: Interurban Press. ISBN 0-916374-93-9.
• Pinkpank, Jerry A (1973). The Second Diesel Spotter’s Guide. Kalmbach Books. pp. 282, 287. ISBN 0-89024-026-4.